After a chance arrest, the killer is finally caught and the failures of the investigation are laid bare in the wake of the trial.

West Yorkshire Police launch a huge public appeal in the hope of rooting out the killer as some detectives begin to voice concerns about the investigation.

The police revisit historic attacks in the hope of identifying further victims, and George Oldfield is fired up by the arrival of a letter from the killer.

When another woman survives an attack, detectives hope that they are in with a chance of finding their man as a driver in Leeds emerges as prime suspect.

The investigation spreads to Bradford with the murder of another young woman, and a female police officer is tasked with dangerous undercover work.

The police face the prospect of a multiple murderer at large in the wake of more linked murders, but the testimony of a survivor could turn the tide.

The police struggle to catch the killer of a woman murdered in Leeds, and a desperate mother is forced to make a difficult decision.